Dirt background appears to overlap back button on experimental feature requirements datapack screen for some window sizes

When adding a data pack to a new world, the back button on the experimental feature requirements page has no button background for certain window sizes. The dirt background appears to overlap at some point when resizing the window.

I've narrowed it down to being introduced in the first snapshot for 1.20.2, 23w31a. 
https://minecraft.wiki/w/Java_Edition_23w31a

In this snapshot there were various changes to buttons, so perhaps as a side effect this cropped up.